Absorbed prefixes (im-, il-, ir-) worksheets
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The prefix in- changes its skin to match the word it joins: im- before m and p (impossible), il- before l (illegal), ir- before r (irregular). Usually it means not; sometimes it means in or into (illuminate).
Two grades, one set of words: both print from the same 24. Print one here, or open a grade for examples and teaching notes.
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5th grade Core grade
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Fifth graders sort not-words by their absorbed prefix: im- (impossible, impatient), il- (illegal, illogical), ir- (irregular, irresponsible), and learn that all three are in- shape-shifted to match the base word.
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6th grade
Sixth graders read and spell absorbed-prefix words confidently, explain the double letters at the seam, and extend the idea to other absorbing prefixes they meet (ad-, com-).
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